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Note 3 - Securities (Detail) - Amortized Cost and Approximate Fair Value of Held to Maturity Securities (USD $)
Mar. 31, 2013
Dec. 31, 2012
Approximate Fair Value $ 140,447  
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]
   
Amortized Cost 136,350 181,042
Gross Unrealized Gains 4,097 12,440
Approximate Fair Value $ 140,447 $ 193,482